My iPhone won't let me send text messages!
My iphone will not let me send text messages but i can do everything else from calling to reciving as well as accessing the internet.
I am able to use another sim card in the phone and it work's perfectly. i do not know what else i can do, i have called apple and my service provider, i have reset my network settings and restored it on the ipod. please help!
iPhone 4S, iOS 5.1